Across
- 5. A flagellated solid-bodied larva of most sponges.
- 7. opening
- 9. Fibrous, collagenous material forming the skeletal network of some sponges.
- 12. the nearest approach to a true tissue in sponges is the arrangement in these cells
- 13. ameboid cells that move through the mesohyl and perform a number of functions. They phagocytize particles and receive particles for digestion from choanocytes.
- 14. one of three canal systems. Somewhat look like larger editions of asconoids. Tubular body and a single osculum. Choanocyte layer is folded back.
- 16. One of the 3 classes of living poriferans. Characterized by having calcareous spicules.
- 17. A differentiation of Archaeocytes. Characterized by its ability to secrete spicules.
- 18. a subset of demospongiae. Characterized by encrusting sponges that have simple spicules or lack spicules entirely.
Down
- 1. one of the 3 classes of living poriferans. Characterized by having a skeleton of siliceous spicules, spongin, or both
- 2. A differentiation of Archaeocytes. Characterized by its ability to secrete fibrillar collagen.
- 3. one of the three canal systems. Has the simplest organization, small and tube-shaped.
- 4. one of three canal systems. The most complex organization of sponge types. Most form large masses with numerous oscula.
- 6. one of the 3 classes of living poriferans. Characterized by having six-rayed siliceous spicules.
- 8. line flagellated canals and chambers; ovoid cells with an end embedded in mesohyl and one end exposed. Exposed end contains flagella.
- 9. one of the minute calcareous or siliceous skeletal bodies found in sponges.
- 10. Asexual, cyst-like reproductive unit in freshwater sponges; formed in summer or autumn and capable of overwintering.
- 11. A thin collagenous mesohyl can be found within this cell. This cell is characterized by collar bodies.
- 15. excurrent opening in a sponge